Fix the annoying Pandas warnings

[EgorKraevTransferwise]

A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead
See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Prepare the data as '...'
2. Run '....'
3. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Your environment

• Version of auto-causality, e.g branch/commit #/release/tag
• Source type and setup
• Target type and setup

Additional context
Add any other context about the problem here.